#include <REGX52.H>

void Delay1ms(unsigned int ms)	//@12.000MHz
{
	unsigned char data i, j;
	while(ms)
	{
		i = 2;
		j = 239;
		do
		{
			while (--j);
		} while (--i);
		ms--;
	}
}


void main(void)
{
	while(1)
	{
		P2 = 0xFE;//1111 1110
		Delay1ms(200);
		P2 = 0xFD;//1111 1101
		Delay1ms(200);
		P2 = 0xFB;//1111 1011
		Delay1ms(200);
		P2 = 0xF7;//1111 0111
		Delay1ms(200);
		P2 = 0xEF;//1110 1111
		Delay1ms(200);
		P2 = 0xDF;//1101 1111
		Delay1ms(200);
		P2 = 0xBF;//1011 1111
		Delay1ms(200);
		P2 = 0x7F;//0111 1111
		Delay1ms(200);
	}
}